Move to custom kernel definitions

...nters/Handson/.master/Hands-On-Performance-Counters.ipynb

...ance_Counters/Handson/Hands-On-Performance-Counters.ipynb

...rmance_Counters/Handson/Hands-On-Performance-Counters.pdf

...ers/Handson/Solutions/Hands-On-Performance-Counters.ipynb

...nters/Handson/Solutions/Hands-On-Performance-Counters.pdf

...son/.master/HandsOnPerformanceOptimization-solution.ipynb

...Handson/.master/HandsOnPerformanceOptimization-task.ipynb

...OWER/Handson/.master/HandsOnPerformanceOptimization.ipynb

...mizing_POWER/Handson/HandsOnPerformanceOptimization.ipynb

...timizing_POWER/Handson/HandsOnPerformanceOptimization.pdf

...on/Solution-Notebook/HandsOnPerformanceOptimization.ipynb

...dson/Solution-Notebook/HandsOnPerformanceOptimization.pdf

4-GPU/HandsOn/HandsOnGPUProgramming.ipynb

4-GPU/HandsOn/Solution/HandsOnGPUProgramming_Solution.ipynb